From 16cba6fdacd1f4e861d5477d2a3fb183415dd9e1 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 26 Nov 2025 23:17:24 +0000
Subject: [PATCH 1/2] Initial plan


From e5f21bea9174c64101396720c614b31be46ec8c1 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 26 Nov 2025 23:23:04 +0000
Subject: [PATCH 2/2] Add SQLite WAL mode and busy_timeout to prevent database
 locking errors

Co-authored-by: Hexagon <419737+Hexagon@users.noreply.github.com>
---
 backend/db/index.ts   | 6 ++++++
 backend/db/minimal.ts | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/backend/db/index.ts b/backend/db/index.ts
index 458b13a..22089ff 100644
--- a/backend/db/index.ts
+++ b/backend/db/index.ts
@@ -50,6 +50,12 @@ async function openDatabase(options: DatabaseOpenOptions) {
     fileName = resolve(path, "main.db");
   await Deno.mkdir(path, { recursive: true });
   const database = new Database(fileName, options);
+
+  // Enable WAL mode for better concurrency (allows concurrent readers and writers)
+  database.exec("PRAGMA journal_mode = WAL");
+  // Set busy timeout to 30 seconds to wait for locks instead of failing immediately
+  database.exec("PRAGMA busy_timeout = 30000");
+
   return database;
 }
 
diff --git a/backend/db/minimal.ts b/backend/db/minimal.ts
index 545fb44..1ca0f83 100644
--- a/backend/db/minimal.ts
+++ b/backend/db/minimal.ts
@@ -6,6 +6,12 @@ async function openDatabase(options: DatabaseOpenOptions) {
     fileName = resolve(path, "main.db");
   await Deno.mkdir(path, { recursive: true });
   const database = new Database(fileName, options);
+
+  // Enable WAL mode for better concurrency (allows concurrent readers and writers)
+  database.exec("PRAGMA journal_mode = WAL");
+  // Set busy timeout to 30 seconds to wait for locks instead of failing immediately
+  database.exec("PRAGMA busy_timeout = 30000");
+
   return database;
 }